Functional connectivity (FC)(4) Postherpetic neuralgia (PHN)(4) Gray matter (GM)(4) Herpes zoster (HZ)(4) Voxel-based morphometry (VBM).(4) neurotropism(2) cell type(2) upregulation(2) SARS-CoV-2(2) SARS-CoV-2 strain(2) Infection(2) Cell(2) cells(2) replicate(2) quantification(2) Analysis(2) epithelial cell(2) Perspective(2) Express(2) SARS-COV-2 infection(2) MOIs(2) CTSL(2) described(2) epithelial cells(2) were expressed(2) Coronavirus-2(2) Neuroblastoma(2) CTSB(2) downregulation(2) Apoptosis(2)